Upgrade to Pro — share decks privately, control downloads, hide ads and more …

写真はもう信用できない?フェイク検出から来歴証明へ

Sponsored · Ship Features Fearlessly Turn features on and off without deploys. Used by thousands of Ruby developers.

 写真はもう信用できない?フェイク検出から来歴証明へ

Avatar for Shuhei Shitamori

Shuhei Shitamori

October 25, 2025
Tweet

More Decks by Shuhei Shitamori

Other Decks in Technology

Transcript

  1. ࣗݾ঺հ Լ৿ɹपฏ • ΧφμͷσδλϧID ελʔτΞοϓ Ͱ
 ಇ͘iOS ΤϯδχΞ • Swift

    Package΍XCFramework͹͔ͬΓ৮ͬͯΔ • ॳΊͯࡳຈϚϥιϯʹࢀՃ 10km׬૸ • ࠷ۙɺձࣾΛ࡞Γ·ͨ͠ • ࠓ೔ͷൃද͸΄΅iOSʹؔ܎ͳ͍Ͱ͢ ࿈བྷઌɾSNS
  2. ϑΣΠΫࣸਅͷྺ࢙ (1) ҉ࣨɾϑΟϧϜͷ࣌୅ • ෺ཧతͳՃ޻ʹΑΔվ͟Μ • ଟॏ࿐ग़ͰͷࡱӨ • ҉ࣨ߹੒ •

    ߴίετͰઐ໳Ո͚͕ͩ࡞Εͨ ϑΣΠΫͷଘࡏ͸ೝ஌͞Ε͍͕ͯͨ
 ࣸਅࣗମ͸৴༻͞Ε͍ͯͨ https://en.wikipedia.org/wiki/ Brown_Lady_of_Raynham_Hall ৺ྶࣸਅ(Brown Lady) https://natgeo.nikkeibp.co.jp/atcl/ gallery/052101927/index.html?P=3 ผਓͷ঻૾͔Β߹੒ͨ͠
 ϦϯΧʔϯͷ঻૾
  3. ϑΣΠΫࣸਅݕग़ͷݶք ϐΫηϧσʔλͷ׆༻-1 ϐΫηϧσʔλ͔Βෆࣗવͳಛ௃Λ୳͢ • Ճ޻ɾੜ੒࣌ಛ༗ͷϊΠζ • ͋Γ͑ͳ͍෺ཧݱ৅ɾੜཧݱ৅ • ޫͷ൓ࣹ •

    ݂؅ • ଞͷը૾σʔλͱͷൺֱ ͜ΕΒͷ࢓૊ΈΛֶशͨ͠ߴੑೳAIͳΒಥഁՄೳੑେ ը૾σʔλ 001011100… ϐΫηϧσʔλ ϝλσʔλ ࡱӨ࣌৘ใ Exif ѹॖ৘ใ ඇѹॖ Ϗοτਂ౓ ̔bit ɾɾɾ ɾɾɾ
  4. ϑΣΠΫࣸਅݕग़ͷݶք ϐΫηϧσʔλͷ׆༻-2 Ճ޻ɾੜ੒࣌ʹ΢ΥʔλʔϚʔΫΛຒΊࠐΈ • Մࢹ΢ΥʔλʔϚʔΫ • ෆՄࢹ΢ΥʔλʔϚʔΫ • Google SynthID

    ΢ΥʔλʔϚʔΫΛຒΊࠐ·ͳ͍πʔϧ͕࢖ΘΕΔՄೳੑ ը૾σʔλ 001011100… ϐΫηϧσʔλ ϝλσʔλ ࡱӨ࣌৘ใ Exif ѹॖ৘ใ ඇѹॖ Ϗοτਂ౓ ̔bit ɾɾɾ ɾɾɾ https://deepmind.google/science/ synthid/
  5. ͳͥࠓਂࠁͳͷ͔ σδλϧϑΥτ× SNS × ੜ੒AI ࣌୅ ݱ୅͸ • ݸਓ΍૊৫͕͋ΒΏΔ໨తͰ •

    ϑΣΠΫͩͱݟഁΕͳ͍AIࣸਅΛੜ੒͠ • SNS্Ͱେྔʹ֦ࢄ͞ΕΔ࣌୅ Ұఆͷ৴༻ͷ͋ͬͨੲͱҧ͍ʮຊ෺ʯͷࣸਅ·ͰٙΘΕΔΑ͏ʹͳͬͨ
  6. ίϯςϯπฤूऀ ίϯςϯπར༻ऀ ίϯςϯπੜ੒ऀ C2PAن֨: Content Credentials • AdobeɾBBCɾSONYͳͲ͕ࡦఆ͢Δۀքඪ४ن֨ • ʮͲ͜Ͱɺ୭͕ɺͲͷΑ͏ʹ࡞੒ɾฤू͔ͨ͠ʯ


    ͱ͍͏དྷྺ৘ใΛσδλϧॺ໊෇͖Ͱอଘ Χϝϥ ੜ੒AI Adobe Photoshop Google Photo Youtube ը૾σʔλ ը૾σʔλ ը૾σʔλ ੜ੒དྷྺ৘ใ ΛຒΊࠐΈ ฤूདྷྺ৘ใ ΛຒΊࠐΈ ฤूདྷྺ৘ใ Λ֬ೝ BBC News https://c2pa.org/
  7. C2PA: Content Credentials ίϯςϯπσʔλʹॺ໊ࡁΈདྷྺϨίʔυσʔλຒΊࠐΈ • ੜ੒ऀ৘ใ͔ΒɺΧϝϥͰࡱӨ͞Ε͔ͨΘ͔Δ • ฤूऀ৘ใ͔ΒɺͲͷΑ͏ʹՃ޻͞Ε͔ͨΘ͔Δ • σʔλΛվ͟Μ͞Εͯ΋ॺ໊σʔλʹΑΓݕ஌Մೳ

    • ۀքඪ४ن֨ͳͷͰΤίγεςϜΛ࡞ΕΔ ը૾σʔλ 001011100… ϐΫηϧσʔλ ϝλσʔλ ࡱӨ࣌৘ใ Exif ѹॖ৘ใ ඇѹॖ Ϗοτਂ౓ ̔bit ɾɾɾ ɾɾɾ དྷྺϨίʔυσʔλ ॺ໊෇͖ੜ੒ऀ৘ใ ॺ໊෇͖ฤूऀ৘ใ ॺ໊෇͖ฤूऀ৘ใ ɾɾɾ
  8. JPEG Trust • JPEG͕ओಋ͢Δࠃࡍඪ४ن֨(ISO/IEC 21617) • 2025೥1݄ʹن֨Խ • ڈ೥ࡳຈͰن֨Խʹ޲͚ͨձ͕ٞ͋ͬͨΒ͍͠ •

    C2PAͷΑ͏ͳདྷྺ৘ใΛؚΊɺ
 ը૾ͷ৴༻౓Λ਺஋Խ ը૾ͷ৴༻ΛఆྔධՁͰ͖ΔΑ͏ʹͳΔ https://jpeg.org/jpegtrust/
  9. ΤίγεςϜͷݱঢ় C2PAରԠ͸ൃల్্, JPEG Trust͸ܾ·ͬͯͳ͍͜ͱ΋ଟ͍ • ੜ੒ऀ • Χϝϥ: Leica, Nikon,

    Sony, Google PixelͷҰ෦ػछ • ੜ੒AI: OpenAIͷDALLE • ฤू಺༰ͷ௥Ճ • Adobe Photoshop • ར༻ऀ • YouTube, Google Photo, BBC ੜ੒ऀ͔Βར༻ऀ·ͰC2PAରԠ͠ͳ͍ͱ͍͚ͳ͍ͷͰɺԸܙΛड͚ΒΕΔͷ͸΋͏গ͠ઌʹͳΓͦ͏
  10. iOSΤϯδχΞͱͯ͠Ͱ͖Δ͜ͱ • ։ൃΞϓϦͰC2PAΤίγεςϜ΁ͷߩݙ • ը૾ฤूΞϓϦ → ը૾ʹདྷྺϨίʔυΛ௥Ճ • ը૾഑৴ΞϓϦ →

    དྷྺϨίʔυΛ࡟আ͠ͳ͍ • χϡʔεΞϓϦ → JPEG TrustݕূʹΑΓ৴པ౓νΣοΫ • SNSΞϓϦ → JPEG TrustݕূʹΑΓ৴པ౓ΛՄࢹԽ • iPhoneΧϝϥ͕C2PAରԠ͞ΕΔΑ͏ʹApple΁ѹྗ iOS޲͚SDK https://github.com/contentauth/c2pa-ios